Police Lt. Duane Fisher said the vandal likely struck between 9:30 p.m. Tuesday and 1 a.m., when the graffiti was spotted by police. (The township’s public safety building is on the same block as the office.) Police would be reviewing footage from nearby surveillance cameras in coming days, Lt. Fisher said.

While the district office has long been a presence on busy Route 19, Lt. Fisher said it was the first such incident he could recall. “The office has been very low-key,” he said.